Mixing machine



March 14, 1944;

- D. c. JONES MIXING MACHINE Filed Feb. 9, 1942 24 Q a E I 52 24 g 2 Sheets-Sheet 1 mun March14, 1944. A D JONES 2,344,307

MIXING MACHINE Filed Feb. 9, 1942 2 Sheets-Sheet 2 Patented Mar. 14, 1944 UNITED STATES MIXING MACHINE Daniel C. Jones, Port Washington,

to Koehring Company, peration of Wisconsin Application February 9, 1942, Serial No. 430,126

Claims.

This invention relates to material mixers generally contemplated to be embodied in self-contained units, and thereby being portable, thus adapted to uses in many places, or in certain instances, to be incorporated into stationary mixing plants for the production of various types of aggregate.

Primarily, mixers of this type include suitable frame means supported on conventional axles, or the like, and including a mixing drum adapted to be charged by a skip, or some similar instrumentality, with discharging means provided to be manipulated by the operator of the machine. There is generally provided a motor unit adapted to be connected to suitable mixing blades within the drum, and likewise, to raise and lower the charging skip.

The particular adaptation of mixer to which this invention is directed is that known as a bituminous mixer, wherein the same is adapted to agitate andhomogenize bituminous aggregate, and discharge the same in a particular place, or into a suitable truck for distribution thereby.

In this particular type of mixer, there is generally provided some means of heating the drum or the contents thereof, and, heretofore, this has been accomplished by forming a shell around the outer surface of the drum and spaced therefrom in order to maintain a substantially heated area over this entire surface. Likewise, in mixers which incorporate charging skips, or similar means, of necessity, considerable superstructure has been provided to facilitate the raising and lowering of the said skip with aggregate therein, the superstructure being usually of relatively complicated construction to handle the weight of the skip and contents, when the same is raised to charge the aggregate into the mixing drum. These previous constructions of bituminous mixers have necessitated the addition of considerable unnecessary weight in the form of superstructure, as above set forth, and, likewise, the additional shell-like member placed around the drum to provide a heat containing means.

In accordance with the above set forth description of previous mixers of the type described, it is the purpose of this invention to eliminate much unnecessary weight, to simplify the construction of the superstructure frame and design a simple means of heating the aggregate during the mixing operation.

A specific object of this invention is to eliminate entirely the lower portion of the superstructure or hoisting frame, and substitute, therefore, the drum for containing and mixing the ag- Wis., assignor Milwaukee, Wis., a corgregate, providing simple upright supports for the upper portion of the hoisting frame, supported on the ends of the drum, including in the upper portion bracing means of inexpensive type and utilizing the hoisting shaft supported by the upright members to form a por tion of the hoisting frame.

A further specific object of this invention is to provide a combustion chamber, integral with the frame upon which the mixing drum is mounted, and utilizing the members which comprise the frame as walls for the combustion chamber, the same being integrally welded, or otherwise attached to the bottom portion of the mixing drum, and in combination with a bottom plate suitably spaced therefrom, and likewise attached to the frame members to provide a combustion chamber wherein the heat for heating the contents of the mixer will be confined and directed to the proper place, to suitably maintain the mixture in a heated condition, preliminary to its discharge.

It is a further object of this invention to provide suitable heating means in the form of burners, or the like, which are readily emplaced adjacent the previously described combustion chamber, and adapted to heat the same, and may readily be removed therefrom, for purposes of cleaning or other desired use thereof.

Further and more specific objects of this invention will be apparent upon the consideration of the specification and claims attached hereto, and upon reference to the drawings.

In the drawings- Figure 1 is a perspective view of a mixer showing the relationship between the skip, the mixing drum, and the combustion chamber with the hoisting frame readily observable therein with portions of the wheels being broken away.

Figure 2 is a fragmentary sectional view of the base portion of the mixing drum, and including certain of the channel members, which comprise the frame and combustion chamber and showing the burners for heating the same in relation thereto. v

Figure 3 is a side View, primarily diagrammatic, to illustrate the general form of the mixer with the charging chute in raised position in fulllines, and in dotted position, when lowered, and certain other features more particularly to be described.

Figure 4 is a front view of the mixer showing the skip in raised position, and illustrating the compact relationship of the power unit, the frame and the mixing drum mounted thereon in a mixer adapted for portability.

Referring now to Figure 1, there is shown a base frame generally denoted A and having integrally attached thereto and thereabove, a mixing chamber B, the said mixing chamber or drum supporting thereabove a hoisting frame C for raising and lowering the skip D. The sub-base frame upon which the base frame A is supported will be generally called E, and will, in most cases,v

not be further referred to, since it is primarily any well known type of wheeled support upon which the mixer may be carried.

A suitable power plant F is supported adjacent one end of the base frame A in compact relationship therewith, and suitably arranged for driving the various portions of the mixer such as the mixing instrumentalities Within the drum and the charging skip.

Referring now to the base frame A, there are shown side channel members I and 2, and an end channel member 3 suitably engaged at their lower portions with a bottom plate l adapted to close the opening provided thereby. The mixing drum B is shown as having the end members 5 and 6 suitably engaged with the upper edges of the channel members I, 2, respectively, by any well known means, such as welding, whereby to afford an integral construction, the said mixing drum B including a bottom portion or member 1 suitably engaged with the end members 5 and 6, by welding or the like, this bottom member 1 of the mixing drum thereby closing the upper opening provided by the previously mentioned side and end members I and 2 and 3, whereby a closed combustion chamber is provided.

The end member I of the frame or combustion chamber A is so formed as to provide a longitudinal extension 8 and the upright member 9 thereof is provided with openings H1 adapted to receive therein suitable burners H, the said burners ll being removably supported on the extension 8 by any suitable means. The said burners II are provided with fuel by a suitable pressure tank [3 connected with the burners by conventional tubing l4, provided with valves l5 for in- .dividually operating the burners, the said tubing M being flexible and upon loosening of the nuts provided on the U bolts l2 permit the burners l l to be removed or replaced for heating the combustion chamber A, in a well known manner.

Th mixing drum, generally denotedB, is provided with replaceable liners I6 and I1, interiorly of the ends, and upon the bottom member 1, a liner i8 is likewise provided, the sides of the drum being similarly protected from wear by liner members Hi. I

In the fragmentary View of Figure 2, portions of the agitating paddles are shown, the same being generally supported on a shaft mounted in the end members 5 and 6 upon suitable bearing members 2|. The agitating means for the aggregate are not herein further described, or shown, since they may be generally conventional and adapted to be operated by the motor in a well known manner. In the rear side 19' of the drum is provided a suitable discharge gate, generally denoted G, adapted to be operated by suitable toggle members, generally denoted 22, as controlled by a lever 23. This particular discharge gate or opening will not further be referred to since it is generally conventional and may be of several different types.

Figure 2, for a description of Adjacent the upper edges of thesidelmembers 5 and 6, and generally above the opening provided by the mixing drum, is a suitable oil tank 24, adapted to be operated in a well known manner, oil being supplied thereto through a pipe 25 supplied by a pump operated by said motor F in a manner within the skill of the art.

The hoisting frame, generally denoted C, located forwardly and substantially above the mixing drum B i generally comprised of the mixing drum B as a lower portion thereof, with suitable upright members 26 in this particular instance being in the form of tubular members seated on abutments or ears 2'! at their lower ends, and being provided at their upper ends with bearing portions 28, said bearing portion receiving therein a, hoisting shaft 29 adapted to raise and lower the skip in a manner to be described.

Suitable gussets 30 integral with the upper ends of the tubular members 26 are provided, and bracing turn-buckle rods 3| are adapted to be engaged at one end With the, said gussets and at the other end with the upper edge of the end walls '5 and 5 of the mixing drum.

Suitable U bolts 32 are likewise provided to maintain the supporting members 25 in their proper generally perpendicular relationship. The hoisting shaft 29 is provided at one end with a cable spool 33 adapted to have reeved thereabout the hoisting cable 34, which is suitably engaged in ears 35 of the skip D, and the hoisting cable passing therearound the skip, to a similar spool 33. adjacent the opposite end of the hoisting shaft 29 on which the other end of the cable 34 is reeved. A large pulley or cable spool 36 is provided adjacent the last mentioned cable spool 33, and keyed to the said shaft from whence a cable 31 passes downwardly to be reeved about a pulley 3B operable by the power means or motor F upon. suitable actuation of clutch members associated therewith, but not shown.

At the forward side of the mixer is provided a track structure, generally denoted H, suitably braced to the frame A and engaged with the upper side, of the mixing drum B, the same being a collapsible or pivotal track which is well known, and which is not here further described. The skip D is provided with suitable rolling means adjacent one end thereof adapted to operate in the track in a well known manner. When the large cable spool 35 is operated by the engine F through means of the cable 31, it will be apparent that the hoisting shaft 29 will be rotated and thereby rotate the cable spools adjacent the ends of said shaft, thus raising the skip from the dotted position shown in Figure 3, to the full line position shown therein, whereby the aggregates may be discharged into the mixing drum to thereafter beagitated in the well known manner.

As is well known, when the aggregates are deposited in the skip lowered to the ground to receive the same, the skip D is thereafter raised by the hoisting shaft, as actuated by the power means F, and deposits the aggregates in the mixing drum which is substantially open at the top thereof.

During the course of said operation, the agitating means interiorly of the drum are being rotated, and the oil pan 24 is thereafter filled with oil from a reservoir and then operated in a manner to dump the contents thereof over the aggregates being agitated within the drum. The heating burner in the combustion chamber A are, of course, in operation, and provide heat at the bottomcf thesaid, chamber A: to maintain the temperature of the contents in a free flowing manner. After suitable time has elapsed during which the contents of the drum have been agitated, the discharge gate or door G is operated to open the same, and the contents of the mixer are thereupon deposited into any suitable container, or at a place to which they are directed.

From the foregoing description, it will be apparent that there is provided a novel form of combustion chamberincorporated in the base frame of the mixer described, the mixing drum being integrally engaged therewith, the said mixing drum likewise providin the lower portion of a hoisting frame. The hoisting frame is provided with an upper portion in the form of simple supporting members for supporting a hoisting means or instrumentality adapted to be actuated by a motor or power means to raise and lower, or otherwise operate a charging device or means.

A mixer of economical manufacture and simple construction is the result of the foregoing, and is adapted to be used in the mixing of other materials beside bituminous mix where a heating of the contents is desired, or in certain cases, the hoisting frame, as set forth, may be availed of without reference to heating the mixing drum.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a mixer of the class described, in combination, a base frame, an upwardly open mixing drum engaged therewith and comprising the lower portion of a hoisting frame, charging means for said drum, supports carried by the ends of said drum at the outer sides of said ends and hoisting instrumentalities for the charging means engaged with said supports comprising the upper portion of said hoisting frame.

2. A mixer as claimed in claim 1, wherein the base frame comprising integral spaced side channel members and a bottom plate, and the base portion of the drum integral therewith form a combustion chamber.

3. A mixer as claimed in claim 1, wherein said base frame and the drum integral therewith comprise a combustion chamber and heating means are provided for said chamber.

4. In a mixer of the class described, in combi nation, a base frame, an upwardly open mixing drum engaged therewith and comprising the lower portion of a hoisting frame, charging means for said drum, supports seated at their lower ends in a substantially vertically central position on said drum, brace means and a hoisting shaft engaged with said supports comprising the upper portion of said frame, and means operable with said hoisting shaft for raising and lowering the charging means.

5. In a mixer of the class described, in combination, a base frame, a mixing drum engaged therewith and comprising the lower portion of a hoisting frame, charging means for said drum, supports seated on' said drum below the top thereof and hoisting instrumentalities engaged with said supports at their upper ends comprising the upper portion of said hoisting frame, said charging means being operable by said instrumentalities.

DANIEL C. JONES. 

